15.

Pistils not prominently exserted before anthesis, about as long or no more than a few times longer than the stamens.
section Xialophyllium Schott

14.

Stems short or somewhat elongate but not conspicuously elongate or viney, usually more than 2 cm diam. (slender but repent in section Chamaerepium  Schott); blades various but only rarely +/- oblong, cor-date or variously lobed at the base with prominent posterior lobes.

16.

Stems repent; internodes short with persistent, intact cataphylls; leaves narrowly ovate; spadix short, cylindrical.
section Chamaerepium Schott

Stems erect or repent only at the base; internodes short or somewhat elongate; cataphylls persistent or not, usually not remaining intact except for section Calomystrium ; spadices various, usually long-tapered.

16.

17.

Leaves velvety, usually metallic green in color, the epidermal cells papillate or otherwise elevated; petioles frequently conspicuously ribbed; B-chromosomes present.
section Cardiolonchium Schott

Leaves not velvety, usually not metallic green, the epidermal cells flat, not papillate or raised; petioles various; B-chromosomes lacking.

17.

18.

Ovary locules 2-ovulate; leaves subrounded, deeply cordate; spadix long-stipitate; Cuba and Jamaica.
section Gymnopodium Engl.

Ovary locules 1-ovulate; leaf shape various but usually not subrounded; spadices stipitate or not; throughout the range of the genus.

18.

19.

Blades moderately thin, often conspicuously veiny or even bullate; primary lateral veins numerous and mostly closely parallel.
section Polyneurium Engl.

Blades coriaceous or nearly so, smooth or veiny but usually not conspicuously bullate, the primary lateral veins neither numerous nor closely parallel.

19.

20.

Stems usually bearing conspicuous, thick, intact, reddish-brown cataphylls; leaf blades usually thick, the minor veins usually not prominently raised; upper blade surface usually with raphide cells visible; spathe typically erect, often colorful; spadix with thick, usually glossy tepals.
section Calomystrium Schott emend. Engl.

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